The Effects of Soil Compaction on Radish Growth

The Effects of Soil Compaction on Radish Growth

The Effects of Soil Compaction on Radish Growth I.E., T.G., D.H., M.M., and Janice Wing Project from STEM Earth Central Plant Growth Basics Required conditions Water

Nutrients Soil medium Sunlight Temperature Role of pore space in soil Compaction Modeling human impact on land

Vehicles on land Hiking trails Impact on plant growth Experiment Hypothesis Highly compacted soil will hinder plant germination and slow early growth.

Our Experiment 4 soil types 3 degrees of soil compaction Controlled environmental conditions Water Sunlight Soil volume Number of seeds

Depth and spacing of seeds Experiment Methods Watering Heavy Compaction Tap-Down Compaction Watering

Levels of Compaction Note Standing Water Measurements Percent germination Growth rate (height) Germination

Percent Germination by Date % Germination by Date loose normal compact 90.0% 80.0% 70.0%

60.0% 50.0% 40.0% 30.0% 20.0% 10.0%

0.0% 8/1/2005 8/2/2005 8/3/2005 8/4/2005 8/5/2005 8/6/2005

Average Seeding Growth Rate Average Seedling Growth Rate loose normal compact 6.5 6 5.5 5 4.5

height (cm) 4 3.5 3 2.5 2 1.5 1 0.5 0 4-Aug

5-Aug 5-Aug 6-Aug 6-Aug 7-Aug 7-Aug

Radish Growth Considerations Standing water Original soil moisture Soil particle size and pore size Different soil types Conclusions Soil compaction reduces percent

germination Heavy compaction reduces growth rate Future Questions Is limited growth due to Small pore size? Limited water percolation? Increased pressure?

Anoxia? New Skills Learned Manipulating photographs in Adobe Photoshop Elements Filter

Artistic Paint Daubs Image Transform Distort Composited Layers (to hide leaves) Animated 3 images in PowerPoint Result = Growing Radish

Hyperlink The Effects of Soil Compaction on Radish Growth Grows on Mouse Click. Third picture appears on delay. Hyperlink

I.E., T.G., D.H., M.M., and Janice Wing Project from STEM Earth Central New Skills Learned Picture as background Composited Layers Result = Original background No price tag

Our Experiment 4 soil types Distracting numbers in the background GONE! 3 degrees of soil compaction Controlled environmental conditions Water

Sunlight Soil volume Number of seeds Depth and spacing of seeds New Skills Learned Use of slide master Result = Easier slide manipulation

Greater consistency Custom Radish Insert movie Result seen later The End Lets Celebrate!

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